CN103312483A - Information sending and receiving control method, base station and UE (user equipment) - Google Patents

Information sending and receiving control method, base station and UE (user equipment) Download PDF

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Publication number
CN103312483A
CN103312483A CN2012100672438A CN201210067243A CN103312483A CN 103312483 A CN103312483 A CN 103312483A CN 2012100672438 A CN2012100672438 A CN 2012100672438A CN 201210067243 A CN201210067243 A CN 201210067243A CN 103312483 A CN103312483 A CN 103312483A
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pdcch
alternative
dmrs port
search volume
local formula
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CN103312483B (en
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李迎阳
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Huawei Device Co Ltd
Huawei Device Shenzhen Co Ltd
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Huawei Device Co Ltd
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Priority to CN201210067243.8A priority Critical patent/CN103312483B/en
Priority to EP13761681.9A priority patent/EP2819477B1/en
Priority to PCT/CN2013/072566 priority patent/WO2013135179A1/en
Publication of CN103312483A publication Critical patent/CN103312483A/en
Priority to US14/484,767 priority patent/US20150009937A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides an information sending and receiving control method, a base station and UE (user equipment). The information sending control method comprises the following steps that a searching space corresponding to the UE in a subframe is determined, and the searching space maps one or a plurality of local optional E-PDCCHs (extended-physical downlink control channels) in one aggregation level in the same RB (resource block) pair or the same group of RB pair; DMRS (demodulation reference signal) ports required to be used by one or a plurality of local optional E-PDCCHs are determined, wherein different DMRS ports correspond to different local optional E-PDCCHs; one optional E-PDCCH is selected from the searching space for sending control information, and in addition, reference signals of the DMRS ports corresponding to the selected optional E-PDCCHs are sent. The embodiment of the invention has the advantages that the blocking problem of the E-PDCCHs can be solved, and in addition, the reliability of the E-PDCCHs of the UE is improved.

Description

Control information method of sending and receiving, base station and subscriber equipment
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to a kind of control information method of sending and receiving, base station and subscriber equipment.
Background technology
Existing Long Term Evolution (Long Term Evolution, hereinafter to be referred as: LTE) introduced Physical Downlink Control Channel (the Physical Downlink Control CHannel that transmits based on the precoding mode in the system, hereinafter to be referred as: PDCCH), namely (Extended) PDCCH of Zeng Qianging (hereinafter to be referred as: E-PDCCH).According to different mapping modes, E-PDCCH can be divided into E-PDCCH and the distributed E-PDCCH of local formula.E-PDCCH for local formula, it is concentrated and is mapped in a Resource Block (Resource Block, hereinafter to be referred as: RB) to or adjacent one group of RB to interior, the base station can be according to subscriber equipment (User Equipment, hereinafter to be referred as: the channel status that UE) reports, channel condition preferably RB to sending the E-PDCCH of local formula, thereby obtain the frequency scheduling gain.For distributed E-PDCCH, its dispersion is mapped to a plurality of RB to last, thereby obtains frequency diversity gain.
No matter be E-PDCCH or the distributed E-PDCCH of local formula, it all needs to transmit two parts content on running time-frequency resource, i.e. reference signal part and data symbol part.UE is in order to carry out blind Detecting to alternative E-PDCCH in the search volume, can partly do channel estimating based on the reference signal of alternative E-PDCCH earlier, data division to this alternative E-PDCCH carries out demodulation then, then can decode and cyclic redundancy check (CRC) (Cyclic Redundancy Check, hereinafter to be referred as: CRC) etc. whether this alternative E-PDCCH of operation judges sends to oneself.
But, E-PDCCH for local formula, if shone upon a plurality of alternative E-PDCCH at same or same group RB to interior in the search volume, then occurred all disabled situations of a plurality of alternative E-PDCCH often, thereby cause the base station not send E-PDCCH to UE.
Summary of the invention
The embodiment of the invention provides a kind of control information method of sending and receiving, base station and subscriber equipment.
On the one hand, provide a kind of control information sending method, comprising:
Determine search volume corresponding with user equipment (UE) in the subframe, described search volume same Resource Block RB to or same group of RB to the alternative enhanced physical down control channel E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determine the demodulated reference signal DMRS port of the required use of alternative E-PDCCH of described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
From described search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
On the other hand, provide a kind of control information method of reseptance, comprising:
Receive the subframe that the base station sends, and determine the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determine the DMRS port of the required use of alternative E-PDCCH of described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
Reference signal according to the DMRS port of the required use of determining is carried out channel estimating, according to channel estimation results, the alternative E-PDCCH of the local formula in the described search volume is carried out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
On the other hand, provide a kind of base station, comprising:
First determination module be used for to be determined the subframe search volume corresponding with user equipment (UE), described search volume same Resource Block RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Second determination module, for the demodulated reference signal DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
Sending module is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
On the other hand, provide a kind of subscriber equipment, comprising:
Receiver module be used for to receive the subframe that the base station sends, and determines the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determination module, for the DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
The blind Detecting module, the reference signal that is used for the DMRS port of the definite required use of basis is carried out channel estimating, according to channel estimation results, the alternative E-PDCCH of the local formula in the described search volume is carried out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
In the above embodiment of the present invention, search volume corresponding with UE in the subframe can be determined in the base station, this search volume can be used for UE the alternative E-PDCCH of local formula is carried out blind Detecting, then, at an E-PDCCH polymerization rank, if this search volume at a RB to the interior alternative E-PDCCH that has shone upon one or more local formula, then the DMRS port of the required use of alternative E-PDCCH of above-mentioned one or more local formula can be determined in the base station, and, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different, namely allow the alternative E-PDCCH of these other local formulas of same polymeric level use the reference signal of different DMRS ports, and then guaranteeing that same RB is separate to the alternative E-PDCCH of interior other local formula of same polymeric level, a plurality of alternative E-PDCCH that avoids sharing the UE that identical DMRS port occurs owing to the alternative E-PDCCH of same other a plurality of local formulas of polymer grade is disabled problem simultaneously.
On the one hand, provide another kind of control information sending method, comprising:
Determine search volume corresponding with UE in the subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Determine the DMRS port of the required use of alternative E-PDCCH of each local formula;
From described search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
On the other hand, provide another kind of control information method of reseptance, comprising:
Receive the subframe that the base station sends;
Determine search volume corresponding with UE in the described subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Determine the DMRS port of the alternative E-PDCCH correspondence of described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
On the other hand, provide another kind of base station, comprising:
First determination module, be used for determining the subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Second determination module is for the DMRS port of the required use of alternative E-PDCCH of determining each local formula;
Sending module is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
On the other hand, provide another kind of subscriber equipment, comprising:
Receiver module is used for receiving the subframe that the base station sends;
Determination module, be used for determining the described subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
The blind Detecting module, the DMRS port that is used for the alternative E-PDCCH correspondence of definite described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
In the above embodiment of the present invention, the base station can select the position of only RB to send the alternative E-PDCCH of each local formula in flexibility ground, the alternative E-PDCCH of these local formulas can be mapped to the RB of different frequency position respectively to last, and allow the mapping each local formula alternative E-PDCCH RB between frequency interval big as far as possible, because the channel condition on the right frequency location of different RB is different, and frequency interval is more big, independence between the subcarrier is more strong, just have at least the alternative E-PDCCH of a local formula can satisfy the link performance requirement among the alternative E-PDCCH of a plurality of local formulas of easier assurance, thereby realize the gain of frequency selective scheduling.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of control information sending method embodiment one of the present invention;
Fig. 2 is the flow chart of control information method of reseptance embodiment one of the present invention;
Fig. 3 is the flow chart of control information sending method embodiment two of the present invention;
Fig. 4 is the flow chart of control information method of reseptance embodiment two of the present invention;
Fig. 5 is the structural representation of base station embodiment one of the present invention;
Fig. 6 is the structural representation of base station embodiment two of the present invention;
Fig. 7 is the structural representation of base station embodiment three of the present invention;
Fig. 8 is the structural representation of base station embodiment four of the present invention;
Fig. 9 is the structural representation of base station embodiment five of the present invention;
Figure 10 is the structural representation of base station embodiment six of the present invention;
Figure 11 is the structural representation of base station embodiment seven of the present invention;
Figure 12 is the structural representation of subscriber equipment embodiment one of the present invention;
Figure 13 is the structural representation of subscriber equipment embodiment two of the present invention;
Figure 14 is the structural representation of subscriber equipment embodiment three of the present invention;
Figure 15 is the structural representation of subscriber equipment embodiment four of the present invention;
Figure 16 is the structural representation of subscriber equipment embodiment five of the present invention;
Figure 17 is the structural representation of subscriber equipment embodiment six of the present invention;
Figure 18 is the structural representation of subscriber equipment embodiment seven of the present invention;
Figure 19 is the structural representation of base station embodiment eight of the present invention;
Figure 20 is the structural representation of base station embodiment nine of the present invention;
Figure 21 is the structural representation of base station embodiment ten of the present invention;
Figure 22 is the structural representation of base station embodiment 11 of the present invention;
Figure 23 is the structural representation of subscriber equipment embodiment eight of the present invention;
Figure 24 is the structural representation of subscriber equipment embodiment nine of the present invention;
Figure 25 is the structural representation of subscriber equipment embodiment ten of the present invention;
Figure 26 is the structural representation of subscriber equipment embodiment 11 of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the flow chart of control information sending method embodiment one of the present invention, and as shown in Figure 1, the method for present embodiment can comprise:
Step 101, determine search volume corresponding with UE in the subframe, this search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Step 102, determine the DMRS port of the required use of alternative E-PDCCH of one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
Step 103, from this search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH of selection.
Need to prove: step 101 to the executive agent of step 103 is base stations.
Specifically, E-PDCCH and Physical Downlink Shared Channel (Physical Downlink Shared Channel, hereinafter to be referred as: PDSCH) by frequency division multiplexing (Frequency-division multiplexing, hereinafter to be referred as: the multiplexing data area in subframe of mode FDM), can thereby knowing the base station configuration, each UE in the residential quarter be used for the resource of all RB of E-PDCCH to one group of resource of RB that is used for E-PDCCH of cell configuration; Perhaps, also can be that each UE is disposed the resource of RB that can be used for transmitting E-PDCCH respectively, for example (Radio Resource Control, hereinafter to be referred as RRC) signaling, namely the resource of RB of the different UEs E-PDCCH that need detect can be different to radio resource control.Alternative E-PDCCH in the search volume corresponding with UE can only be distributed in configuration be used for transmission E-PDCCH the resource of RB a part of RB to.
A RB is to interior resource element (the Resource Element that can be used for transmitting the E-PDCCH data division, hereinafter to be referred as: RE) number is a lot, these control informations that all are used for transmitting same UE are very uneconomic, so be similar to control channel unit (the Control Channel Element among the PDCCH, hereinafter to be referred as: concept CCE), these RE also can be divided into the enhancing of several E-PDCCH the control channel unit (Extended Control Channel Element, hereinafter to be referred as: eCCE).E-PDCCH is polymerized by one or more eCCE, is the E-PDCCH of L for the polymerization rank, and it is polymerized by L eCCE.Here do not limit each eCCE and must have identical RE number, wherein, L is respectively the integer greater than 0.
The above-mentioned general character part that is E-PDCCH and the distributed E-PDCCH of local formula, but, the E-PDCCH of local formula and the difference between the distributed E-PDCCH are, the reference signal of distributed E-PDCCH is shared by a plurality of UE, and the E-PDCCH of different UEs distinguishes with eCCE, therefore, and on the search volume corresponding with UE, only need to determine the position of eCCE of the alternative E-PDCCH of UE blind Detecting, and need not to determine and different UEs corresponding reference signal respectively; E-PDCCH for local formula, its reference signal is exclusively used in some UE, in the E-PDCCH search volume corresponding with UE, need to determine simultaneously reference signal and the eCCE that alternative E-PDCCH takies, (DeModulation Reference Signal is hereinafter to be referred as DMRS) port to determine this reference signal also namely to determine demodulated reference signal.
Concerning the alternative E-PDCCH of other local formula of polymer grade, can occur the search volume corresponding with UE same RB to or same group of RB to the situation of the alternative E-PDCCH of the one or more local formulas of interior mapping, specifically be a RB to or one group of RB is right, depend on the collocation method of search volume.If be mapped in same RB to or one group of RB the alternative E-PDCCH of interior same other a plurality of local formulas of polymer grade is used the reference signal of identical DMRS port, in case then this DMRS port is taken by the E-PDCCH of other UE, then the alternative E-PDCCH of a plurality of local formulas of this UE is with unavailable, thus cause the base station can not this RB to or this group RB send E-PDCCH to interior to this UE.
For this reason, in the present embodiment, search volume corresponding with UE in the subframe can be determined in the base station, and this search volume is used for this UE the alternative E-PDCCH of local formula is carried out blind Detecting.Then, at an E-PDCCH polymerization rank, if this search volume at a RB to the interior alternative E-PDCCH that has shone upon one or more local formula, then the DMRS port of the required use of alternative E-PDCCH of above-mentioned one or more local formula can be determined in the base station, and, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different, namely allow the alternative E-PDCCH of these other local formulas of same polymeric level use the reference signal of different DMRS ports, and then guaranteeing that same RB is separate to the alternative E-PDCCH of interior other local formula of same polymeric level, a plurality of alternative E-PDCCH that avoids sharing the UE that identical DMRS port occurs owing to the alternative E-PDCCH of same other a plurality of local formulas of polymer grade is disabled problem simultaneously.
Need to prove, the step 101 among the above-mentioned control information sending method embodiment, its determine the search volume concrete implementation procedure can for:
Configuration is used for the resource of RB of transmission E-PDCCH, is eCCE and to the eCCE numbering then with the resource division of these RB, and note eCCE adds up to N CCEConcerning polymerization rank L, continuous L eCCE forms the alternative E-PDCCH of a local formula.According to tree structure, then the beginning eCCE index of the alternative E-PDCCH of n local formula can be
Figure BDA0000143495550000081
Perhaps also can be (nL) mod N CCE, after the index of the beginning eCCE of the alternative E-PDCCH that determines n local formula, can determine that a continuous L eCCE can form the alternative E-PDCCH of the individual local formula of this n.To a polymerization rank, the search volume corresponding with UE is the subclass of alternative E-PDCCH defined above.
In addition, the embodiment of the invention does not limit the specific implementation process of determining the search volume, and those skilled in the art can set up the search volume as required on their own.
In order to realize the technical scheme of above-mentioned control information sending method embodiment, the embodiment of the invention provides following several base station to determine the technical scheme of DMRS port:
Scheme one, for the resource of all RB that is used for transmission E-PDCCH, determine the DMRS port of the corresponding use of alternative E-PDCCH institute of each local formula respectively.
For example, remember that available DMRS port number is P, then the alternative E-PDCCH of each local formula recycles the reference signal of this P DMRS port successively.To a polymerization rank, the alternative E-PDCCH of n local formula uses (n+ σ) modP DMRS port.σ is a deviant relevant with the polymerization rank with the sign of UE, is different thereby can make the DMRS port of different UEs or other the alternative E-PDCCH mapping of different polymer grade.For example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, and then the alternative E-PDCCH of n local formula uses DMRS port 7+ (n+ σ) modP.
In this programme, corresponding relation between the alternative E-PDCCH of each local formula and the employed DMRS port can be with signaling, also can be to determine with implicit method, be the undesired signal notice, wait to determine this corresponding relation according to some parameters such as cell ID, UE sign and polymerization rank.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme two, for a polymerization rank, determine the DMRS port of the alternative E-PDCCH institute correspondence use of each the local formula in the search volume respectively.
For example, remember that available DMRS port number is P, then the alternative E-PDCCH of each the local formula in the search volume recycles the reference signal of this P DMRS port successively.To a polymerization rank, the alternative E-PDCCH of the n in the search volume local formula uses (n+ σ) modP DMRS port.σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the DMRS port of E-PDCCH mapping in different UEs or other search volume of different polymer grade.For example in LTE version 11, P can equal 4, it is the reference signal that DMRS port 7～10 can be used for E-PDCCH, to a polymerization rank L, the alternative E-PDCCH that comprises the local formula of M polymerization rank L in the note search volume, then the alternative E-PDCCH of n local formula uses DMRS port 7+ (n+ σ) modP, n=0 in the search volume, ..., M-1.Wherein, M is the integer greater than 0.
In this programme, in each polymerization rank, the alternative E-PDCCH of local formula and the corresponding relation between the employed DMRS port can be with signaling, also can be to determine with implicit method, be the undesired signal notice, wait to determine this corresponding relation according to some parameters such as cell ID, UE sign and polymerization rank.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme three, definite configuration are used for eCCE and the corresponding relation between the DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again on the resource of all RB of E-PDCCH.
For example, remember that available DMRS port number is P, can determine that each eCCE recycles the reference signal of this P DMRS port successively.In LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH.For example, to a UE, determine that the corresponding DMRS port of i eCCE is 7+ (i+ σ) modP, σ is the specific deviant of user.
Then, concerning polymerization rank 1, UE can be directly obtains the reference signal that the alternative E-PDCCH of the local formula that is made of this eCCE uses according to the DMRS port of eCCE mapping.To polymerization rank L, for example, L=2,4,8, UE can determine the eCCE that the alternative E-PDCCH of a local formula is to use it and takies, the eCCE of index minimum for example, corresponding DMRS port.
In this programme, corresponding relation between each eCCE and the DMRS port can be with signaling, also can be to determine with implicit method, namely the undesired signal notice waits to determine this corresponding relation according to some parameters such as cell ID, UE sign and polymerization rank.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme four, determine eCCE that each RB is right and the corresponding relation of reference signal DMRS port, determine the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade again.
For example, remember that available DMRS port number is P, can define a RB recycles this P DMRS port successively to each last eCCE reference signal.In LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH.For example, to a UE, determine that a RB is 7+ (i+ σ) modP to the corresponding DMRS port of i interior eCCE, σ is a deviant relevant with the index of RB with the sign of UE.
To polymerization rank 1, UE can be directly obtains the reference signal that the alternative E-PDCCH of the local formula that is made of this eCCE uses according to the DMRS port of eCCE mapping.To polymerization rank L, for example, L equal 2,4 or 8, UE can determine the eCCE that the alternative E-PDCCH of a local formula is to use it and takies, the eCCE of index minimum for example, corresponding DMRS port.
Corresponding relation between eCCE and the reference signal DMRS port can be with signaling; Also can be to determine with implicit method, i.e. undesired signal notice waits to determine this corresponding relation according to some parameters such as cell ID and UE sign.Different RB can be identical to last corresponding relation, also can be to each RB to defining different corresponding relations respectively.Right to a RB, this corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme five, each RB to corresponding one with reference to the DMRS port, to a polymerization rank, each interior alternative E-PDCCH is used the different DMRS port of determining with reference to the DMRS port according to this respectively with a RB of the corresponding search volume of UE.
For example, remember that available DMRS port number is P, divide each RB be used in E-PDCCH to adopting different reference DMRS ports, for example, the right reference DMRS port that defines each RB recycles the reference signal of the DMRS port of this P successively.For example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, can determine reference DMRS port p=7+ (i+ σ) modP that RB is right, i is the index of RB that branch is used in E-PDCCH, and σ is the specific deviant of UE; Perhaps, it all is identical can defining the right reference DMRS port of all RB that branch is used in E-PDCCH, and namely with reference to DMRS port p=σ, σ is the specific deviant of UE.To other E-PDCCH of polymer grade, if the search volume a RB on only shone upon the alternative E-PDCCH of a local formula, then use with reference to DMRS port p and transmit its reference signal.To other E-PDCCH of polymer grade, if the search volume at a RB to having shone upon the alternative E-PDCCH of a plurality of local formulas, remember that its number is C, then the alternative E-PDCCH of described C local formula uses the different DMRS port of determining with reference to DMRS port p according to this respectively.For example, according to the alternative E-PDCCH of this C local formula in the eCCE ordering of this RB to the index minimum that takies, during perhaps according to the definition search volume corresponding with UE in the order of this RB to the alternative E-PDCCH of the local formula of shining upon, the alternative E-PDCCH of i local formula this RB on can use DMRS port 7+ (p-7+i) modP, i=0, ..., C-1.
In this programme, can be with signaling with reference to DMRS port p; Also can be to determine with implicit method, i.e. undesired signal notice waits to determine according to some parameters such as cell ID and UE sign.Different RB can be identical to last reference DMRS port p, also can be to each RB to defining different reference DMRS port p respectively.Right to a RB, this can be that the residential quarter is specific with reference to DMRS port p, broadcast signaling for example, namely in the residential quarter all UE all according to identical reference DMRS port p work; This also can be that UE is specific with reference to the DMRS port, RRC signaling for example, and namely different UEs can have different reference DMRS port p.
In this programme, when the alternative E-PDCCH of local formula of different polymer grades other each is mapped to identical RB when interior, can guarantee that the DMRS port that they use is consistent, therefore, UE can only do channel estimating one time, and is used for the demodulation to the eCCE of a plurality of other E-PDCCH of polymer grade.Alternatively, when the alternative E-PDCCH of a local formula is mapped to a plurality of adjacent R B when, if support thereby different RB are estimated to strengthen channel estimating performance to last combined channel, then can determine the alternative E-PDCCH that is mapped to the right local formula of a plurality of adjacent R B to this, use according to the definite DMRS port that will use of the right reference DMRS port of one of them RB unified at a plurality of RB, for example according to the RB of the index minimum DMRS port to determining to use, thereby simplify the channel estimating complexity.
Scheme six, every group of RB to corresponding one with reference to the DMRS port, to a polymerization rank, with the corresponding search volume of UE use the different DMRS port of determining with reference to the DMRS port according to this respectively at each right alternative E-PDCCH of one group of RB.
In this programme, one group of RB is to referring to channel condition information (Channel Status Information, hereinafter to be referred as: CSI) subband of Hui Baoing, Resource Block group (Recourse Block Group, hereinafter to be referred as: RBG) or the one group of RB that supports combined channel to estimate right.Can be with signaling with reference to DMRS port p; Also can be to determine with implicit method, i.e. undesired signal notice waits to determine according to some parameters such as cell ID and UE sign.Different RB can be identical to the reference DMRS port p on the group, also can be to every group of RB to defining different reference DMRS port p respectively.Right to one group of RB, this can be that the residential quarter is specific with reference to DMRS port p, broadcast signaling for example, namely in the residential quarter all UE all according to identical reference DMRS port p work; This also can be that UE is specific with reference to the DMRS port, RRC signaling for example, and namely different UEs can have different reference DMRS ports.
For example, remember that available DMRS port number is P, divide be used in E-PDCCH respectively organize RB to adopting different reference DMRS ports, for example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, can define one group of reference DMRS port p=7+ (i+ σ) modP that RB is right, i is the group index of RB that branch is used in E-PDCCH, and σ is the specific deviant of UE; Perhaps, on organizing, all be identical at all RB with reference to the DMRS port, namely with reference to DMRS port p=σ, σ is the specific deviant of UE.To other E-PDCCH of polymer grade, if one group of RB on only shone upon the alternative E-PDCCH of a local formula, then use DMRS port p to transmit its reference signal.To other E-PDCCH of polymer grade, if RB is organized to having shone upon the alternative E-PDCCH of a plurality of local formulas at this in the search volume corresponding with UE, remember that its number is C, then the alternative E-PDCCH of described C local formula uses the different DMRS port of determining according to reference DMRS port p respectively.For example, according to the alternative E-PDCCH of this C local formula in the eCCE ordering of this group RB to the index minimum that takies, perhaps when determining the search volume corresponding with UE in the order of same group of RB to the alternative E-PDCCH of the local formula of shining upon, the alternative E-PDCCH of i local formula this group RB on can use DMRS port 7+ (p-7+i) modP, i=0, ..., C-1.
Adopt this programme, when the alternative E-PDCCH of the local formula of different stage is mapped to one group of identical RB when interior, can guarantee that the DMRS port that they use is consistent, thereby UE can only do channel estimating one time, and be used for the demodulation to the eCCE of a plurality of other E-PDCCH of polymer grade.
Above content description the implementation procedure of control information sending method embodiment one of the present invention, it is the specific implementation of base station side, correspondingly, provides the implementation of UE side correspondence below.
Fig. 2 is the flow chart of control information method of reseptance embodiment one of the present invention, and as shown in Figure 2, the method for present embodiment can comprise:
Step 201, receive the subframe that the base station sends, and determine the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Step 202, determine the DMRS port of the required use of alternative E-PDCCH of described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
The reference signal of the DMRS port of the required use that step 203, basis are determined is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
Need to prove: step 201 to the executive agent of step 103 is subscriber equipmenies.
Specifically, to a subframe, UE can determine in this subframe for the search volume of the alternative E-PDCCH of local formula being carried out blind Detecting then.Then, at an E-PDCCH polymerization rank, if this search volume at a RB to the interior alternative E-PDCCH that has shone upon one or more local formula, then UE can determine the required use of the alternative E-PDCCH DMRS port of above-mentioned one or more local formula, and, different DMRS ports are alternative E-PDCCH of the different local formula of correspondence, also be that UE is when carrying out channel estimating, can use the reference signal of different DMRS ports at the alternative E-PDCCH of these other local formulas of same polymeric level, therefore, same RB is independently to the alternative E-PDCCH of interior other local formula of same polymeric level, thus a plurality of alternative E-PDCCH that avoids as far as possible sharing the UE that identical DMRS port occurs owing to the alternative E-PDCCH of same other a plurality of local formulas of polymer grade disabled problem simultaneously.
Need to prove, the step 201 among the above-mentioned control information method of reseptance embodiment, its determine the search volume concrete implementation procedure can for:
UE can be known the base station in advance to the definition of search volume, namely according to the definition of this search volume, need to determine the alternative E-PDCCH of the local formula of blind Detecting.Particularly, for polymerization rank L, according to tree structure, determine that the index of beginning eCCE of the alternative E-PDCCH of n local formula is
Figure BDA0000143495550000131
Perhaps also can be (nL) mod N CCE, after the index of the beginning eCCE of the alternative E-PDCCH that determines n local formula, can determine that a continuous L eCCE can form the alternative E-PDCCH of the individual local formula of this n.Concerning polymerization rank L, the search volume corresponding with UE is the subclass of alternative E-PDCCH defined above.
In addition, the embodiment of the invention does not limit the specific implementation process that UE determines the search volume yet, and those skilled in the art can set up the search volume corresponding with UE as required on their own, only needs UE and base station to adopt the definition of identical search volume to get final product.
In order to realize the technical scheme of above-mentioned control information method of reseptance embodiment, the embodiment of the invention provides following several technical scheme to realize above-mentioned steps 202 definite DMRS ports, and every kind of technical scheme all determines that with above-mentioned base station side the technical scheme of DMRS port is corresponding one by one:
Scheme one, according to the alternative E-PDCCH of each the local formula on the resource of all RB that is used for transmission E-PDCCH with the corresponding relation between the DMRS port of corresponding use, the employed DMRS port of alternative E-PDCCH of other local formula of polymer grade in definite search volume corresponding with UE.
For example, remember that available DMRS port number is P, then for the resource of RB that is used for transmission E-PDCCH, the alternative E-PDCCH of each local formula recycles the reference signal of this P DMRS port successively.
In this corresponding relation, to a polymerization rank, the alternative E-PDCCH of n local formula uses (n+ σ) modP DMRS port.σ is a deviant relevant with the polymerization rank with the sign of UE, is different thereby can make the DMRS port of different UEs or other the alternative E-PDCCH mapping of different polymer grade.For example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, and then the alternative E-PDCCH of n local formula uses DMRS port 7+ (n+ σ) modP.
In this programme, UE both can receive the notice signaling of base station transmission and obtain the alternative E-PDCCH of each local formula and the corresponding relation between the employed DMRS port, the notice that also can not need the base station, and according to some parameters, wait to determine this corresponding relation as cell ID, UE sign and polymerization rank.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme two, according to the alternative E-PDCCH of other each local formula of polymer grade in the search volume corresponding with UE with the corresponding relation between the DMRS port of corresponding use, the employed DMRS port of alternative E-PDCCH of other local formula of polymer grade in definite search volume corresponding with UE.
For example, remember that available DMRS port number is P, then the alternative E-PDCCH of each the local formula in the search volume corresponding with UE recycles the reference signal of this P DMRS port successively.To a polymerization rank, the alternative E-PDCCH of the n in the search volume corresponding with UE local formula uses (n+ σ) modP DMRS port.σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the DMRS port of E-PDCCH mapping in different UEs or other search volume of different polymer grade.For example in LTE version 11, P can equal 4, it is the reference signal that DMRS port 7～10 can be used for E-PDCCH, to a polymerization rank L, remember the alternative E-PDCCH that comprises the local formula of M polymerization rank L in the search volume corresponding with UE, then the alternative E-PDCCH of n local formula uses DMRS port 7+ (n+ σ) modP, n=0 in the search volume, ..., M-1.
In this programme, at each polymerization rank, the base station can be by the alternative E-PDCCH of the local formula of signaling and the corresponding relation between the employed DMRS port, also can not need notice, UE can wait to determine this corresponding relation as cell ID, UE sign and polymerization rank according to some parameters.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme three, be used for eCCE on the resource of RB of E-PDCCH and the corresponding relation between the DMRS port according to configuration, determine the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade.
For example, remember that available DMRS port number is P, each eCCE recycles the reference signal of this P DMRS port successively in the search volume corresponding with UE.In LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH.For example, to a UE, determine that the corresponding DMRS port of i eCCE is 7+ (i+ σ) modP, σ is the specific deviant of user.
Concerning polymerization rank 1, UE can be directly obtains the reference signal that the alternative E-PDCCH of the local formula that is made of this eCCE uses according to the DMRS port of eCCE mapping.To polymerization rank L, for example, L=2,4,8, UE can determine the eCCE that the alternative E-PDCCH of a local formula is to use it and takies, the eCCE of index minimum for example, corresponding DMRS port.
In this programme, the corresponding relation between each eCCE and the DMRS port can be that signaling UE is passed through in the base station, also can be UE according to some parameters, wait to determine this corresponding relation as cell ID, UE sign and polymerization rank.This corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme four, according to the right eCCE of RB and the corresponding relation of DMRS port, determine that this RB is to the employed DMRS port of the alternative E-PDCCH of last each other local formula of polymer grade.
For example, remember that available DMRS port number is P, can define a RB recycles this P DMRS port successively to each last eCCE reference signal.In LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH.For example, to a UE, determine that a RB is 7+ (i+ σ) modP to the corresponding DMRS port of i interior eCCE, σ is a deviant relevant with the index of RB with the sign of UE.
To polymerization rank 1, UE can be directly obtains the reference signal that the alternative E-PDCCH of the local formula that is made of this eCCE uses according to the DMRS port of eCCE mapping.To polymerization rank L, for example, L equal 2,4 or 8, UE can determine the eCCE that the alternative E-PDCCH of a local formula is to use it and takies, the eCCE of index minimum for example, corresponding DMRS port.
Corresponding relation between eCCE and the reference signal DMRS port can be that signaling is adopted in the base station, also can notify by undesired signal, and UE waits to determine this corresponding relation according to some parameters as cell ID and UE sign.Different RB can be identical to last corresponding relation, also can be to each RB to defining different corresponding relations respectively.Right to a RB, this corresponding relation can be that the residential quarter is specific, broadcast signaling for example, namely in the residential quarter all UE all according to identical corresponding relation work; This corresponding relation also can be that UE is specific, RRC signaling for example, and namely different UEs can have different corresponding relations.
Scheme five, each RB to corresponding one with reference to the DMRS port, to a polymerization rank, each interior alternative E-PDCCH is used the different DMRS port of determining with reference to the DMRS port according to this respectively with a RB of the corresponding search volume of UE.
For example, remember that available DMRS port number is P, divide each RB be used in E-PDCCH to adopting different reference DMRS ports, for example, the right reference DMRS port that defines each RB recycles the reference signal of this P DMRS port successively.For example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, can determine reference DMRS port p=7+ (i+ σ) modP that RB is right, i is the index of RB that branch is used in E-PDCCH, and σ is the specific deviant of UE; Perhaps, it all is identical can defining the right reference DMRS port of all RB that branch is used in E-PDCCH, and namely with reference to DMRS port p=σ, σ is the specific deviant of UE.To the alternative E-PDCCH of other local formula of polymer grade, if the search volume corresponding with UE a RB on only shone upon the alternative E-PDCCH of a local formula, then do channel estimating based on the reference signal of reference DMRS port p.To other E-PDCCH of polymer grade, if the search volume corresponding with UE at this RB to having shone upon the alternative E-PDCCH of a plurality of local formulas, remember that its number is C, then the alternative E-PDCCH of this C local formula is used respectively according to this and do channel estimating with reference to the different DMRS port that DMRS port p determines.For example, according to the alternative E-PDCCH of this C local formula in the eCCE ordering of this RB to the index minimum that takies, perhaps when determining the search volume corresponding with UE in the order of same RB to the alternative E-PDCCH of the local formula of shining upon, the alternative E-PDCCH of i local formula this RB on can use DMRS port 7+ (p-7+i) modP, i=0, ..., C-1.
In this programme, can be with signaling with reference to DMRS port p; Also can be to determine with implicit method, i.e. undesired signal notice waits to determine according to some parameters such as cell ID and UE sign.Different RB can be identical to last reference DMRS port p, also can be to each RB to defining different reference DMRS port p respectively.Right to a RB, this can be that the residential quarter is specific with reference to DMRS port p, broadcast signaling for example, namely in the residential quarter all UE all according to identical reference DMRS port p work; This also can be that UE is specific with reference to the DMRS port, RRC signaling for example, and namely different UEs can have different reference DMRS port p.
In this programme, when the alternative E-PDCCH of local formula of different polymer grades other each is mapped to identical RB when interior, can guarantee that the DMRS port that they use is consistent, therefore, UE can only do channel estimating one time, and is used for the demodulation to the eCCE of a plurality of other E-PDCCH of polymer grade.Alternatively, when the alternative E-PDCCH of a local formula is mapped to a plurality of adjacent R B when, if support thereby different RB are estimated to strengthen channel estimating performance to last combined channel, then can determine to this be mapped to a plurality of adjacent R B concerning the alternative E-PDCCH of local formula, UE can use according to the definite DMRS port that will use of the right reference DMRS port of one of them RB unified at a plurality of RB, for example according to the RB of the index minimum DMRS port to determining to use, thereby simplify the complexity that UE estimates the right combined channel of each RB.
Scheme six, every group of RB to corresponding one with reference to the DMRS port, to a polymerization rank, each interior alternative E-PDCCH is used the different DMRS port of determining with reference to the DMRS port according to this with the search volume that UE is corresponding respectively at one group of RB.
In this programme, one group of RB is right to subband, the RBG that can refer to CSI and report or one group of RB supporting combined channel to estimate.Can be with signaling with reference to DMRS port p; Also can be to determine with implicit method, i.e. undesired signal notice waits to determine according to some parameters such as cell ID and UE sign.Different RB can be identical to the reference DMRS port p on the group, also can be to every group of RB to defining different reference DMRS port p respectively.Right to one group of RB, this can be that the residential quarter is specific with reference to DMRS port p, broadcast signaling for example, namely in the residential quarter all UE all according to identical reference DMRS port p work; This also can be that UE is specific with reference to the DMRS port, RRC signaling for example, and namely different UEs can have different reference DMRS port p.
For example, remember that available DMRS port number is P, divide be used in E-PDCCH respectively organize RB to adopting different reference DMRS ports, for example in LTE version 11, P can equal 4, and namely DMRS port 7～10 can be used for the reference signal of E-PDCCH, can define one group of reference DMRS port p=7+ (i+ σ) modP that RB is right, i is the group index of RB that branch is used in E-PDCCH, and σ is the specific deviant of UE; Perhaps, on organizing, all be identical at all RB with reference to the DMRS port, namely with reference to DMRS port p=σ, σ is the specific deviant of UE.To other E-PDCCH of polymer grade, if one group of RB on only shone upon the alternative E-PDCCH of a local formula, then do channel estimating based on reference DMRS port p.To other E-PDCCH of polymer grade, if RB is organized to having shone upon the alternative E-PDCCH of a plurality of local formulas at this in the search volume corresponding with UE, remember that its number is C, then the alternative E-PDCCH of this C local formula uses the different DMRS port of determining according to reference DMRS port to do channel estimating respectively.For example, according to the alternative E-PDCCH of this C local formula in the eCCE ordering of this group RB to the index minimum that takies, perhaps when determining the search volume corresponding with UE in the order of same RB to the alternative E-PDCCH of the local formula of shining upon, the alternative E-PDCCH of i local formula this group RB on can use DMRS port 7+ (p-7+i) modP, i=0, ..., C-1.
Adopt this programme, when the alternative E-PDCCH of the local formula of different stage is mapped to identical RB when interior to organizing, can guarantee that the DMRS port that they use is consistent, UE can only do channel estimating one time, and is used for the demodulation to the eCCE of a plurality of other E-PDCCH of polymer grade.
The front was described, and for the transmission of E-PDCCH, it comprises two parts, and a part is reference signal, and another part is data symbol.Previous embodiment at reference signal determine be illustrated, below at this data symbol partly relevant search volume determine describe.
In the process of the search volume of determining local formula E-PDCCH, the channel quality that the base station can report based on UE selects optimum RB to sending the E-PDCCH of local formula.So-called optimum RB is right, and it is right to be the best RB of channel quality, thereby can improve the reliability of the E-PDCCH of local formula as far as possible; Perhaps, under the condition that certain eCCE divides, might any one RB to can satisfying the reliability requirement of E-PDCCH, thereby make that the E-PDCCH of local formula can be at the best RB of channel quality to mapping, the best RB of this channel quality is to being for the performance that improves PDSCH.Concerning a polymerization rank, UE needs a plurality of different alternative E-PDCCH of blind Detecting, and these alternative E-PDCCH constitute the search volume corresponding with UE.
Below base station in the embodiment of the invention is determined that the right process of RB of the alternative E-PDCCH of each local formula of mapping in the search volume describes.
Fig. 3 is the flow chart of control information sending method embodiment two of the present invention, and as shown in Figure 3, the method for present embodiment can comprise:
Step 301, determine search volume corresponding with UE in the subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Step 302, determine the DMRS port of the required use of alternative E-PDCCH of each local formula;
Step 303, from described search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH of selection.
Need to prove: step 301 to the executive agent of step 303 is base stations.
Specifically, because the channel condition on the right frequency location of different RB is different, and frequency interval is more big, independence between the subcarrier is more strong, just have at least the alternative E-PDCCH of a local formula can satisfy the link performance requirement among the alternative E-PDCCH of a plurality of local formulas of easier assurance, thereby realize the gain of frequency selective scheduling.For this reason, in the present embodiment, the base station can select the position of only RB to send the alternative E-PDCCH of each local formula in flexibility ground, the alternative E-PDCCH of these local formulas can be mapped to the RB of different frequency position respectively to last, and allow the mapping each local formula alternative E-PDCCH RB between frequency interval big as far as possible.
This detailed process is: the base station is determined the search volume corresponding with UE in the subframe earlier, this search volume is used for this UE the alternative E-PDCCH of local formula is carried out blind Detecting, when comprising the alternative E-PDCCH of same other at least two local formulas of polymer grade in the search volume, the alternative E-PDCCH of these at least two local formulas is mapped in the RB of different frequency position to last.Then, the DMRS port of the required use of alternative E-PDCCH of each local formula can be determined in the base station, then, a base station selected alternative E-PDCCH sends control information and sends the reference signal of corresponding DMRS port, thereby UE can be by the blind Detecting to its search volume, receiving control information on base station selected alternative E-PDCCH.
Need to prove that the definition of this search volume is that UE is specific, the namely different search volumes corresponding with UE can be nonoverlapping, or not exclusively overlapping, thereby reduce the problem of the obstruction of the E-PDCCH between the UE.To same UE, other E-PDCCH of its different polymer grades also can be mapped on the position of different RB in addition, thereby can further alleviate the problem of the obstruction of the E-PDCCH between the UE.
In addition, need to prove that the specific implementation process of above-mentioned steps 302 can preferably adopt aforementioned control information sending method embodiment one and six concrete schemes to realize, repeats no more herein.
Provide several concrete implementations below, the step 301 of above-mentioned method embodiment shown in Figure 3 is elaborated.
Scheme one, search volume comprise that at least two group RB are right, the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped to described at least two group RB to last, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, RB refers to subband, the RBG that CSI reports or supports that one group of RB of combined channel estimation is right for group.
The channel quality that UE reports to the base station can with subband (hereinafter to be referred as: subband) be granularity, each subband comprises that a plurality of continuous RB are right.To a polymerization rank, the alternative E-PDCCH of its local formula disperses to be mapped on the subband as much as possible, and makes the alternative E-PDCCH number of the local formula of shining upon on each subband equal as far as possible.Perhaps, it can be granularity with RBG that the resource of base station is distributed, it is right that RBG comprises a plurality of RB, the width of subband is the integral multiple of RBG, so the method for the above-mentioned alternative E-PDCCH that shines upon local formula based on subband can for: to a polymerization rank, the alternative E-PDCCH of its local formula disperses to be mapped on the RBG as much as possible, and makes the alternative E-PDCCH number of the last local formula of shining upon of each RBG equal as far as possible.
Specifically, configuration is used for the RB of E-PDCCH to being divided into a plurality of groups, and one group of RB that one group of RB here estimates subband, RBG or the support combined channel that can refer to the CSI report is right.Especially, also can be to being one group with 1 RB.The RB that the high-rise configuration of note is used for E-PDCCH is S to the number of group, and to a polymerization rank, needing the alternative E-PDCCH number of the local formula of blind Detecting is M, and then when M＜=S, the alternative E-PDCCH of local formula can be mapped to M respectively and organize RB to last; When M＞S, every group of RB equate the alternative E-PDCCH number of the local formula that comprises or differ one at the most, and namely every group of RB to the alternative E-PDCCH number of the local formula of interior mapping is
Figure BDA0000143495550000201
Perhaps
Figure BDA0000143495550000202
Wherein, the RB that the alternative E-PDCCH of the local formula of different UE is mapped to can be inequality to group, and further, the alternative E-PDCCH of the local formula of different UE also can be inequality at one group of RB to the concrete time-frequency position of interior mapping.For example, to a polymerization rank, UE needs the alternative E-PDCCH of 6 local formulas of blind Detecting, comprise that 6 groups of RB are right if be used for the resource of the E-PDCCH of transmission UE, optimization ground then, to this polymerization rank, every group of RB is to shining upon the alternative E-PDCCH of a local formula.
The M of UE search volume alternative E-PDCCH can be mapped to continuous RB to group, for example, the RB that the alternative E-PDCCH of i local formula can be mapped to is j=(i+ σ) modS to the index j of group, σ is a deviant relevant with the polymerization rank with the sign of UE, can be different with the position of the mapping that guarantees different UEs or other search volume of different polymer grades.Perhaps, because the more big then RB of frequency distance is more little to the correlation between the group, therefore also can maximize the frequency distance of RB to organizing of the alternative E-PDCCH of the local formula of mapping as far as possible, thereby improve the performance of frequency selection scheduling.As M during smaller or equal to S, it is right that the UE search volume is mapped to discontinuous M group RB; As M during greater than S, each RB is to the group mapping
Figure BDA0000143495550000211
Perhaps
Figure BDA0000143495550000212
The alternative E-PDCCH of individual local formula, wherein mapping
Figure BDA0000143495550000213
The RB of the alternative E-PDCCH of individual local formula is that discontinuous RB is to group for group.For example, the RB that is mapped to of the alternative E-PDCCH of i local formula to the index j of group is
Figure BDA0000143495550000214
σ is a deviant relevant with the polymerization rank with the sign of UE, thereby the position that guarantees the mapping of different UEs or other search volume of different polymer grades can be different.
Said process has just been determined RB that the alternative E-PDCCH of a local formula is mapped to group, and it can further be determined the interior alternative E-PDCCH that is mapped to which concrete local formula at one group of RB.For instance, suppose a polymerization rank, one group of RB is to the interior alternative E-PDCCH that can be divided into K local formula, and RB need be organized to the alternative E-PDCCH of C local formula of interior mapping at this in the hypothesis search volume corresponding with UE, then can define the search volume corresponding with UE is l=(i+ υ) modK at this group RB to the alternative E-PDCCH index of the local formula that takies, i=0 ..., C-1, υ are deviants relevant with the polymerization rank with the sign of UE.
Scheme two, search volume comprise that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, and the alternative E-PDCCH of each local formula is mapped to respectively on the continuous L eCCE.
Above-mentioned method of group (subband or RBG etc.) being shone upon the alternative E-PDCCH of local formula based on RB is to suppose at one group of RB the interior alternative E-PDCCH that can determine an integer local formula.This comprises that a RB just in time is divided into integer alternative E-PDCCH situation to the eCCE of group, also comprise a RB to the eCCE of group can not five equilibrium situation.For example, remember that a RB is K to the eCCE number in organizing, then when the aliquant K of polymerization rank L, at this RB to organizing interior division Individual polymerization rank is the alternative E-PDCCH of L.In the resource of RB that is used for transmission E-PDCCH of base station configuration, also can determine the mapping position of the alternative E-PDCCH of every kind of other local formula of polymer grade in this granularity of eCCE.
Specifically, each RB is to being divided into a plurality of eCCE.Remember that one group of RB is N to the number of interior RB PRB, each RB is K to last eCCE number, then eCCE's adds up to N CCE=KN PRBThe alternative E-PDCCH of each local formula can comprise one or more eCCE.Like this, the search volume of the alternative E-PDCCH of each other local formula of polymer grade is at this KN PRBIndividual eCCE goes up definition.At this moment, can guarantee that still the alternative E-PDCCH of a local formula is confined to one group of RB fully to interior, perhaps, also can allow the alternative E-PDCCH of a local formula to stride how group RB are right.
Introduce several RB below earlier to the numbering of last eCCE, based on this numbering, the alternative E-PDCCH that can determine local formula is mapped in the search volume on the continuous eCCE.
Mode one: the reference signal of E-PDCCH of supposing local formula at different RB to being fully independently, namely do not support adjacent R B between combined channel estimate, then this programme can sort to eCCE in the following method, namely earlier a RB is numbered internal eCCE, then to next RB to internal eCCE numbering, namely index is the eCCE correspondence the of i
Figure BDA0000143495550000221
Individual RB for E-PDCCH is to imodK internal eCCE.
Mode two: supposing and can estimate to improve channel estimating performance with the right combined channel of a plurality of RB, also can be to being unit when then eCCE being sorted with one group of adjacent RB.Right to one group of RB, earlier a right eCCE of each RB is numbered, then the right next eCCE of each RB is numbered; Then, the right eCCE of next group RB is numbered.One group of RB that one group of RB here estimates subband, RBG or the support combined channel that can refer to the CSI report is right.Remember that every group of RB is right to comprising A RB, then index is that the eCCE of i is mapped to (imod (AK)) modA RB of group RB centering right the
Figure BDA0000143495550000223
Individual eCCE.
Adopt this eCCE numbering, the alternative E-PDCCH that supposes to comprise the local formula of a plurality of eCCE is made up of continuous eCCE, then the alternative E-PDCCH of these local formulas be mapped to one group of RB to interior a plurality of RB to last, thereby then can estimate to improve precision of channel estimation to the combined channel of last reference signal with a plurality of RB, and then improve the link performance of E-PDCCH.
Alternatively, adopt one group of RB to being the distribution method of granularity if be used in the RB of E-PDCCH at branch when, then can adopt second kind of top eCCE method for numbering serial, if adopt a RB to being the distribution method of granularity, first kind of eCCE method for numbering serial above then adopting.
Concerning distributed E-PDCCH, present embodiment also can provide the numbering of a kind of eCCE: suppose that high level has disposed N RB to being used for the distributed E-PDCCH of transmission, and can be at this N RB to dividing eCCE and numbering; Perhaps, suppose N=AB, namely can be N RB to being divided into A group, every group of B RB is right, then every group B RB on divide eCCE respectively, then this A eCCE that organizes sorted together successively.
On above-mentioned basis to the eCCE numbering, can determine the search volume corresponding with UE.Here, the alternative E-PDCCH position of the different search volume mappings corresponding with UE can be inequality.To a polymerization rank L, the alternative E-PDCCH of each local formula can take a continuous L eCCE, and the number of remembering alternative E-PDCCH is M, and then the search volume is that to be defined in M continuous polymerization rank be the alternative E-PDCCH of L.For example, if consider tree structure, m alternative E-PDCCH is mapped to the eCCE index
Figure BDA0000143495550000231
Perhaps, to be mapped to the eCCE index be ((m+ σ) L+i) mod N to the alternative E-PDCCH of m local formula CCE, i=0 ..., M-1.σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the position of the mapping of different UEs or other search volume of different polymer grades.
Scheme three, search volume comprise the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, and the alternative E-PDCCH of each local formula is mapped to respectively on the continuous L eCCE.
In this programme, the numbering of eCCE still can adopt above-mentioned dual mode, and different with scheme two is that the alternative E-PDCCH of the M in the search volume local formula also can be discontinuous.Here, can make the eCCE of alternative E-PDCCH of different local formulas at interval big as far as possible, thereby make the frequency distance between the alternative E-PDCCH of local formula big as far as possible, a little less than the correlation, thus the benefit of maximization frequency selection scheduling.
For example, the alternative E-PDCCH of m local formula is mapped to the eCCE index and is
Figure BDA0000143495550000232
Perhaps, the alternative E-PDCCH of m local formula is mapped to the eCCE index and is σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the position of the mapping of different UEs or other search volume of different polymer grades.
Above content description the implementation procedure of control information sending method embodiment two of the present invention, it is the specific implementation of base station side, correspondingly, provides the implementation of UE side correspondence below.
Fig. 4 is the flow chart of control information method of reseptance embodiment two of the present invention, and as shown in Figure 4, the method for present embodiment can comprise:
The subframe that step 401, reception base station send;
Step 402, determine search volume corresponding with UE in the described subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Step 403, determine the DMRS port of the alternative E-PDCCH correspondence of described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
Need to prove: step 401 to the executive agent of step 403 is subscriber equipmenies.
Specifically, because the channel condition on the right frequency location of different RB is different, and frequency interval is more big, independence between the subcarrier is more strong, just have at least the alternative E-PDCCH of a local formula can satisfy the link performance requirement among the alternative E-PDCCH of a plurality of local formulas of easier assurance, thereby realize the gain of frequency selective scheduling.For this reason, in the present embodiment, in order to obtain frequency diversity gain, the base station can select the position of only RB to send the alternative E-PDCCH of each local formula in flexibility ground, the alternative E-PDCCH of these local formulas can be mapped to the RB of different frequency position respectively to last, and allow the mapping each local formula alternative E-PDCCH RB between frequency interval big as far as possible, correspondingly, UE detects E-PDCCH at these frequency locations.
Therefore, UE can determine the alternative E-PDCCH of local formula is carried out the search volume of blind Detecting earlier, in the time can comprising the alternative E-PDCCH of same other at least two local formulas of polymer grade in this search volume of determining, the alternative E-PDCCH of these at least two local formulas is mapped in the RB of different frequency position to last.Then, UE can determine the reference signal of DMRS port of the required use of alternative E-PDCCH of each local formula, then, UE carries out channel estimating according to the reference signal of each DMRS port, according to channel estimation results, alternative E-PDCCH to the local formula of correspondence carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
Need to prove that the definition of this search volume is that UE is specific, the namely different search volumes corresponding with UE can be nonoverlapping, or not exclusively overlapping, thereby reduce the problem of the obstruction of the E-PDCCH between the UE.To same UE, other E-PDCCH of its different polymer grades also can be mapped on the position of different RB in addition, thereby can further alleviate the problem of the obstruction of the E-PDCCH between the UE.
Before performing step 402, UE can be known the base station in advance to the definition of search volume, thus with the consistent search volume of base station definition on the alternative E-PDCCH of local formula is carried out blind Detecting.Specifically, the base station can adopt aforementioned schemes one, scheme two or scheme three to determine the search volume, and correspondingly, UE also can carry out blind Detecting according to the alternative E-PDCCH to local formula on the search volume of correspondence.Specifically, UE carries out the following several specific implementations of search volume existence of blind Detecting:
Scheme one, search volume comprise that at least two group RB are right, the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped to described at least two group RB to last, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, RB refers to subband, the RBG that CSI reports or supports that one group of RB of combined channel estimation is right for group.
The channel quality that UE reports to the base station can be granularity with subband, and each subband comprises that a plurality of continuous RB are right.To a polymerization rank, the alternative E-PDCCH of its local formula disperses to be mapped on the subband as much as possible, and makes the alternative E-PDCCH number of the local formula of shining upon on each subband equal as far as possible.Perhaps, it can be granularity with RBG that the resource of base station is distributed, it is right that RBG comprises a plurality of RB, the width of subband is the integral multiple of RBG, so, in the search volume, to a polymerization rank, the alternative E-PDCCH of its local formula disperses to be mapped on the RBG as much as possible, and the alternative E-PDCCH number that each RBG goes up the local formula of shining upon is equal as far as possible.
Specifically, configuration is used for the RB of E-PDCCH to being divided into a plurality of groups, and one group of RB that one group of RB here estimates subband, RBG or the support combined channel that can refer to the CSI report is right.Especially, also can be to being one group with 1 RB.The RB that the high-rise configuration of note is used for E-PDCCH is S to the number of group, and to a polymerization rank, needing the alternative E-PDCCH number of the local formula of blind Detecting is M, and then when M＜=S, the alternative E-PDCCH of local formula can be mapped to M respectively and organize RB to last; When M＞S, every group of RB equate the alternative E-PDCCH number of the local formula that comprises or differ one at the most, and namely every group of RB to the alternative E-PDCCH number of the local formula of interior mapping is
Figure BDA0000143495550000251
Perhaps
Figure BDA0000143495550000252
Wherein, the RB that the alternative E-PDCCH of the local formula of different UE is mapped to can be inequality to group, and further, the alternative E-PDCCH of the local formula of different UE also can be inequality at one group of RB to the concrete time-frequency position of interior mapping.For example, to a polymerization rank, UE needs the alternative E-PDCCH of 6 local formulas of blind Detecting, comprise that 6 groups of RB are right if be used for the resource of the E-PDCCH of transmission UE, optimization ground then, to this polymerization rank, every group of RB is to shining upon the alternative E-PDCCH of a local formula.
The M of UE search volume alternative E-PDCCH can be mapped to continuous RB to group, for example, the RB that the alternative E-PDCCH of i local formula can be mapped to is j=(i+ σ) modS to the index j of group, σ is a deviant relevant with the polymerization rank with the sign of UE, can be different with the position of the mapping that guarantees different UEs or other search volume of different polymer grades.Perhaps, because the more big then RB of frequency distance is more little to the correlation between the group, therefore also can maximize the frequency distance of RB to organizing of the alternative E-PDCCH of the local formula of mapping as far as possible, thereby improve the performance of frequency selection scheduling.As M during smaller or equal to S, it is right that the UE search volume is mapped to discontinuous M group RB; As M during greater than S, each RB is to the group mapping
Figure BDA0000143495550000261
Perhaps
Figure BDA0000143495550000262
The alternative E-PDCCH of individual local formula, wherein mapping
Figure BDA0000143495550000263
The RB of the alternative E-PDCCH of individual local formula is that discontinuous RB is to group for group.For example, the RB that is mapped to of the alternative E-PDCCH of i local formula to the index j of group is
Figure BDA0000143495550000264
σ is a deviant relevant with the polymerization rank with the sign of UE, thereby the position that guarantees the mapping of different UEs or other search volume of different polymer grades can be different.
Said process has just been determined RB that the alternative E-PDCCH of a local formula is mapped to group, and it can further be determined the interior alternative E-PDCCH that is mapped to which concrete local formula at one group of RB.For instance, suppose a polymerization rank, one group of RB is to the interior alternative E-PDCCH that can be divided into K local formula, and RB need be organized to the alternative E-PDCCH of C local formula of interior mapping at this in the hypothesis search volume corresponding with UE, then can define the search volume corresponding with UE is l=(i+ υ) modK at this group RB to the alternative E-PDCCH index of the local formula that takies, i=0 ..., C-1, υ are deviants relevant with the polymerization rank with the sign of UE.
Scheme two, search volume comprise that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, and the alternative E-PDCCH of each local formula is mapped to respectively on the continuous L eCCE.
Above-mentioned method of group (subband or RBG etc.) being shone upon the alternative E-PDCCH of local formula based on RB is to suppose at one group of RB the interior alternative E-PDCCH that can determine an integer local formula.This comprises that a RB just in time is divided into integer alternative E-PDCCH situation to the eCCE of group, also comprise a RB to the eCCE of group can not five equilibrium situation.For example, remember that a RB is K to the eCCE number in organizing, then when the aliquant K of polymerization rank L, at this RB to organizing interior division
Figure BDA0000143495550000265
Individual polymerization rank is the alternative E-PDCCH of L.In the resource of RB that is used for transmission E-PDCCH of base station configuration, UE also can determine the mapping position of the alternative E-PDCCH of every kind of other local formula of polymer grade in this granularity of eCCE.
Specifically, each RB is to being divided into a plurality of eCCE.Remember that one group of RB is N to the number of interior RB PRB, each RB is K to last eCCE number, then eCCE's adds up to N CCE=KN PRBThe alternative E-PDCCH of each local formula can comprise one or more eCCE.Like this, the search volume of the alternative E-PDCCH of each other local formula of polymer grade is at this KN PRBIndividual eCCE goes up definition.At this moment, can guarantee that still the alternative E-PDCCH of a local formula is confined to one group of RB fully to interior, perhaps, also can allow the alternative E-PDCCH of a local formula to stride how group RB are right.
Introduce several RB below earlier to the numbering of last eCCE, based on this numbering, UE can determine that the alternative E-PDCCH of local formula is mapped in the search volume on the continuous eCCE.
Mode one: the reference signal of E-PDCCH of supposing local formula at different RB to being fully independently, namely do not support adjacent R B between combined channel estimate, then this programme can sort to eCCE in the following method, namely earlier a RB is numbered internal eCCE, then to next RB to internal eCCE numbering, namely index is the eCCE correspondence the of i
Figure BDA0000143495550000271
Individual RB for E-PDCCH is to imodK internal eCCE.
Mode two: supposing and can estimate to improve channel estimating performance with the right combined channel of a plurality of RB, also can be to being unit when then eCCE being sorted with one group of adjacent RB.Right to one group of RB, earlier a right eCCE of each RB is numbered, then the right next eCCE of each RB is numbered; Then, the right eCCE of next group RB is numbered.One group of RB that one group of RB here estimates subband, RBG or the support combined channel that can refer to the CSI report is right.Remember that every group of RB is right to comprising A RB, then index is that the eCCE of i is mapped to
Figure BDA0000143495550000272
(imod (AK)) modA RB of group RB centering right the
Figure BDA0000143495550000273
Individual eCCE.
Adopt this eCCE numbering, the alternative E-PDCCH that supposes to comprise the local formula of a plurality of eCCE is made up of continuous eCCE, then the alternative E-PDCCH of these local formulas be mapped to one group of RB to interior a plurality of RB to last, thereby then can estimate to improve precision of channel estimation to the combined channel of last reference signal with a plurality of RB, and then improve the link performance of E-PDCCH.
Alternatively, adopt one group of RB to being the distribution method of granularity if be used in the RB of E-PDCCH at branch when, then can adopt second kind of top eCCE method for numbering serial, if adopt a RB to being the distribution method of granularity, first kind of eCCE method for numbering serial above then adopting.
Concerning distributed E-PDCCH, present embodiment also can provide the numbering of a kind of eCCE: suppose that high level has disposed N RB to being used for the distributed E-PDCCH of transmission, and can be at this N RB to dividing eCCE and numbering; Perhaps, suppose N=AB, namely can be N RB to being divided into A group, every group of B RB is right, then every group B RB on divide eCCE respectively, then this A eCCE that organizes sorted together successively.
On above-mentioned basis to the eCCE numbering, UE can determine the search volume.Here, the alternative E-PDCCH position of the different search volume mappings corresponding with UE can be inequality.To a polymerization rank L, the alternative E-PDCCH of each local formula can take a continuous L eCCE, and the number of remembering alternative E-PDCCH is M, and then the search volume is that to be defined in M continuous polymerization rank be the alternative E-PDCCH of L.For example, if consider tree structure, m alternative E-PDCCH is mapped to the eCCE index
Figure BDA0000143495550000281
Perhaps, to be mapped to the eCCE index be ((m+ σ) L+i) mod N to the alternative E-PDCCH of m local formula CCE, i=0 ..., M-1.σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the position of the mapping of different UEs or other search volume of different polymer grades.
Scheme three, search volume comprise the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, and the alternative E-PDCCH of each local formula is mapped to respectively on the continuous L eCCE.
In this programme, the numbering of eCCE still can adopt above-mentioned dual mode, and different with scheme two is that the alternative E-PDCCH of the M in the search volume local formula also can be discontinuous.Here, the eCCE of the alternative E-PDCCH of different local formulas is at interval big as far as possible, thereby makes the frequency distance between the alternative E-PDCCH of local formula big as far as possible, a little less than the correlation, thus the benefit of maximization frequency selection scheduling.
For example, the alternative E-PDCCH of m local formula is mapped to the eCCE index and is
Figure BDA0000143495550000282
Perhaps, the alternative E-PDCCH of m local formula is mapped to the eCCE index and is
Figure BDA0000143495550000283
σ is a deviant relevant with the polymerization rank with the sign of UE, and it is different can making the position of the mapping of different UEs or other search volume of different polymer grades.
Fig. 5 is the structural representation of base station embodiment one of the present invention, as shown in Figure 5, the base station of present embodiment can comprise: first determination module 11, second determination module 12 and sending module 13, wherein, first determination module 11, be used for to determine the subframe search volume corresponding with user equipment (UE), described search volume same Resource Block RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping; Second determination module 12, for the demodulated reference signal DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different; Sending module 13 is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
The base station of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 1, and its realization principle and technique effect are similar, repeat no more herein.
Fig. 6 is the structural representation of base station embodiment two of the present invention, as shown in Figure 6, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12, can comprise: first determining unit 121, be used for for the resource of all RB that is used for transmission E-PDCCH, determine the DMRS port of the corresponding use of alternative E-PDCCH institute of each local formula respectively.
The base station of present embodiment can be for the technical scheme of carrying out the scheme one of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Fig. 7 is the structural representation of base station embodiment three of the present invention, as shown in Figure 7, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12, can comprise: second determining unit 122, be used for for a polymerization rank, determine the DMRS port of the alternative E-PDCCH institute correspondence use of each the local formula in the search volume respectively.
The base station of present embodiment can be for the technical scheme of carrying out the scheme two of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Fig. 8 is the structural representation of base station embodiment four of the present invention, as shown in Figure 8, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12, can comprise: the 3rd determining unit 123 is used for determining that configuration is used for eCCE and the corresponding relation between the DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again on the resource of all RB of E-PDCCH.
The base station of present embodiment can be for the technical scheme of carrying out the scheme three of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Fig. 9 is the structural representation of base station embodiment five of the present invention, as shown in Figure 9, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12, can comprise: the 4th determining unit 124 is used for eCCE and the corresponding relation of DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again of determining that each RB is right.
The base station of present embodiment can be for the technical scheme of carrying out the scheme four of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 10 is the structural representation of base station embodiment six of the present invention, as shown in figure 10, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12 can comprise: the 5th determining unit 125 is used for a polymerization rank, a RB of search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH, each RB to corresponding one with reference to the DMRS port.
The base station of present embodiment can be for the technical scheme of carrying out the scheme five of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 11 is the structural representation of base station embodiment seven of the present invention, as shown in figure 11, the base station of present embodiment is on the basis of base station shown in Figure 5, further, second determination module 12 can comprise: the 6th determining unit 126 is used for a polymerization rank, the search volume is used the different DMRS port of determining with reference to the DMRS port according to this at one group of RB respectively to each interior alternative E-PDCCH, every group of RB to corresponding one with reference to the DMRS port.
The base station of present embodiment can be for the technical scheme of carrying out the scheme six of method embodiment shown in Figure 1 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 12 is the structural representation of subscriber equipment embodiment one of the present invention, as shown in figure 12, the UE of present embodiment can comprise: receiver module 21, determination module 22 and blind Detecting module 23, wherein, receiver module 21, be used for to receive the subframe that the base station sends, and determine the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping; Determination module 22, for the DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different; Blind Detecting module 23, the reference signal that is used for the DMRS port of the definite required use of basis is carried out channel estimating, according to channel estimation results, the alternative E-PDCCH of the local formula in the described search volume is carried out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
The UE of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 2, and its realization principle and technique effect are similar, repeat no more herein.
Figure 13 is the structural representation of subscriber equipment embodiment two of the present invention, as shown in figure 13, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22, can comprise: first determining unit 221, be used for according to the alternative E-PDCCH of each the local formula on the resource of all RB that is used for transmission E-PDCCH with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
The UE of present embodiment can be for the technical scheme of carrying out the scheme one of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 14 is the structural representation of subscriber equipment embodiment three of the present invention, as shown in figure 14, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22, can comprise: second determining unit 222, be used for according to the alternative E-PDCCH of other each local formula of polymer grade in the search volume with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
The UE of present embodiment can be for the technical scheme of carrying out the scheme two of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 15 is the structural representation of subscriber equipment embodiment four of the present invention, as shown in figure 15, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22, can comprise: the 3rd determining unit 223 is used for determining the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade according to disposing for the eCCE on the resource of RB of E-PDCCH and the corresponding relation between the DMRS port.
The UE of present embodiment can be for the technical scheme of carrying out the scheme three of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 16 is the structural representation of subscriber equipment embodiment five of the present invention, as shown in figure 16, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22, can comprise: the 4th determining unit 224 is used for determining that according to the right eCCE of RB and the corresponding relation of DMRS port this RB is to the employed DMRS port of the alternative E-PDCCH of last each other local formula of polymer grade.
The UE of present embodiment can be for the technical scheme of carrying out the scheme four of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 17 is the structural representation of subscriber equipment embodiment six of the present invention, as shown in figure 17, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22 can comprise: the 5th determining unit 225 is used for a polymerization rank, a RB who determines described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH, each RB to corresponding one with reference to the DMRS port.
The UE of present embodiment can be for the technical scheme of carrying out the scheme five of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 18 is the structural representation of subscriber equipment embodiment seven of the present invention, as shown in figure 18, the UE of present embodiment is on the basis of UE shown in Figure 12, further, determination module 22 can comprise: the 6th determining unit 226 is used for a polymerization rank, determine that described search volume uses the different DMRS port of determining with reference to the DMRS port according to this at one group of RB respectively to each interior alternative E-PDCCH, every group of RB to corresponding one with reference to the DMRS port.
The UE of present embodiment can be for the technical scheme of carrying out the scheme six of method embodiment shown in Figure 2 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 19 is the structural representation of base station embodiment eight of the present invention, as shown in figure 19, the base station of present embodiment can comprise: first determination module 31, second determination module 32 and sending module 33, wherein, first determination module 31, be used for determining the subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last; Second determination module 32 is for the DMRS port of the required use of alternative E-PDCCH of determining each local formula; Sending module 33 is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
The base station of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 3, and its realization principle and technique effect are similar, repeat no more herein.
Figure 20 is the structural representation of base station embodiment nine of the present invention, as shown in figure 20, the base station of present embodiment is on the basis of base station shown in Figure 19, further, first determination module 31, can comprise: first determining unit 311, the alternative E-PDCCH that be used for to determine other at least two the local formulas of polymer grade in described search volume be mapped at least two group RB to, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, RB refers to subband, the RBG that CSI reports or supports that one group of RB of combined channel estimation is right for group.
The base station of present embodiment can be for the technical scheme of carrying out the scheme one of method embodiment shown in Figure 3 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 21 is the structural representation of base station embodiment ten of the present invention, as shown in figure 21, the base station of present embodiment is on the basis of base station shown in Figure 19, further, first determination module 31, can comprise: second determining unit 312 is used for determining that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L.
The base station of present embodiment can be for the technical scheme of carrying out the scheme two of method embodiment shown in Figure 3 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 22 is the structural representation of base station embodiment 11 of the present invention, as shown in figure 22, the base station of present embodiment is on the basis of base station shown in Figure 19, further, first determination module 31, can comprise: the 3rd determining unit 313 is used for determining that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L.
The base station of present embodiment can be for the technical scheme of carrying out the scheme three of method embodiment shown in Figure 3 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 23 is the structural representation of subscriber equipment embodiment eight of the present invention, and as shown in figure 23, the UE of present embodiment can comprise: receiver module 41, determination module 42 and blind Detecting module 43, and wherein, receiver module 41 is used for receiving the subframe that the base station sends; Determination module 42, be used for determining the described subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last; Blind Detecting module 43, the DMRS port that is used for the alternative E-PDCCH correspondence of definite described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
The UE of present embodiment can be for the technical scheme of carrying out method embodiment shown in Figure 4, and its realization principle and technique effect are similar, repeat no more herein.
Figure 24 is the structural representation of subscriber equipment embodiment nine of the present invention, as shown in figure 24, the UE of present embodiment is on the basis of UE shown in Figure 23, further, determination module 42, can comprise: first determining unit 421, be used for determining that described search volume comprises that at least two group RB are right, the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped to described at least two group RB to last, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, group of subband that refers to that CSI reports of RB, RBG or the one group of RB that supports combined channel to estimate are right.
The subscriber equipment of present embodiment can be for the technical scheme of carrying out the scheme one of method embodiment shown in Figure 4 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 25 is the structural representation of subscriber equipment embodiment ten of the present invention, as shown in figure 25, the UE of present embodiment is on the basis of UE shown in Figure 23, further, determination module 42, can comprise: second determining unit 422 is used for determining that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L.
The subscriber equipment of present embodiment can be for the technical scheme of carrying out the scheme two of method embodiment shown in Figure 4 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Figure 26 is the structural representation of subscriber equipment embodiment 11 of the present invention, as shown in figure 26, the UE of present embodiment is on the basis of UE shown in Figure 23, further, determination module 42, can comprise: the 3rd determining unit 423 is used for determining that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L.
The subscriber equipment of present embodiment can be for the technical scheme of carrying out the scheme three of method embodiment shown in Figure 4 when specific implementation, and its realization principle and technique effect are similar, repeat no more herein.
Need to prove, when specific implementation, each module in above-mentioned base station and the subscriber equipment all can multiplexing existing base station or the functional module of subscriber equipment realize.For instance, in above-mentioned base station embodiment, the base station can comprise receiver, transmitter and at least one processor.Each functional module among the above-mentioned base station embodiment itself or its function can be deployed at least one processor and realize.When processor is realized above-mentioned module or its corresponding function, both can adopt software mode to realize, also can adopt hardware mode to realize, perhaps adopt the mode of soft or hard combination to realize, above-described embodiment is not done restriction.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be finished by the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program is carried out the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although the present invention has been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.

Claims (44)

1. a control information sending method is characterized in that, comprising:
Determine search volume corresponding with user equipment (UE) in the subframe, described search volume same Resource Block RB to or same group of RB to the alternative enhanced physical down control channel E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determine the demodulated reference signal DMRS port of the required use of alternative E-PDCCH of described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
From described search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
2. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
For the resource of all RB that is used for transmission E-PDCCH, determine the DMRS port of the corresponding use of alternative E-PDCCH institute of each local formula respectively.
3. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
For a polymerization rank, determine the DMRS port of the alternative E-PDCCH institute correspondence use of each the local formula in the described search volume respectively.
4. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Determine that configuration is used for the control channel unit eCCE of the enhancing on the resource of all RB of E-PDCCH and the corresponding relation between the DMRS port, determine the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade again.
5. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Determine eCCE and the corresponding relation of DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again that each RB is right.
6. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Each RB to corresponding one with reference to the DMRS port, to a polymerization rank, a RB of described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH.
7. method according to claim 1 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Every group of RB to corresponding one with reference to the DMRS port, to a polymerization rank, described search volume is used the different DMRS port of determining with reference to the DMRS port according to this respectively at one group of RB to each interior alternative E-PDCCH.
8. a control information method of reseptance is characterized in that, comprising:
Receive the subframe that the base station sends, and determine the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determine the DMRS port of the required use of alternative E-PDCCH of described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
Reference signal according to the DMRS port of the required use of determining is carried out channel estimating, according to channel estimation results, the alternative E-PDCCH of the local formula in the described search volume is carried out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
9. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
According to the alternative E-PDCCH of each the local formula on the resource of all RB that is used for transmission E-PDCCH with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
10. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
According to the alternative E-PDCCH of other each local formula of polymer grade in the described search volume with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
11. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
For the eCCE on the resource of RB of E-PDCCH and the corresponding relation between the DMRS port, determine the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade according to configuration.
12. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
According to the right eCCE of RB and the corresponding relation of DMRS port, determine that this RB is to the employed DMRS port of the alternative E-PDCCH of last each other local formula of polymer grade.
13. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Each RB to corresponding one with reference to the DMRS port, to a polymerization rank, determine that a RB of described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH.
14. method according to claim 8 is characterized in that, the described DMRS port of determining the required use of alternative E-PDCCH of described one or more local formula comprises:
Every group of RB to corresponding one with reference to the DMRS port, to a polymerization rank, determine that described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively at one group of RB to each interior alternative E-PDCCH.
15. a control information sending method is characterized in that, comprising:
Determine search volume corresponding with UE in the subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Determine the DMRS port of the required use of alternative E-PDCCH of each local formula;
From described search volume, select an alternative E-PDCCH to send control information, and send the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
16. method according to claim 15 is characterized in that, the search volume corresponding with UE in described definite subframe comprises:
Determine that the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped at least two group RB to last in the described search volume, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, group of RB is that channel condition information the CSI subband, the Resource Block group RBG that report or one group of RB supporting combined channel to estimate are right.
17. method according to claim 15 is characterized in that, with UE search volume accordingly, comprising in described definite subframe:
Determine that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, wherein, M and L are respectively the integer greater than 0.
18. method according to claim 15 is characterized in that, the search volume corresponding with UE in described definite subframe comprises:
Determine that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, wherein, M and L are respectively the integer greater than 0.
19. a control information method of reseptance is characterized in that, comprising:
Receive the subframe that the base station sends;
Determine search volume corresponding with UE in the described subframe, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Determine the DMRS port of the alternative E-PDCCH correspondence of described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
20. method according to claim 19 is characterized in that, the described search volume of determining in the described subframe comprises:
Determine that described search volume comprises that at least two group RB are right, the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped to described at least two group RB to last, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, group of RB is that the CSI subband, the RBG that report or one group of RB supporting combined channel to estimate are right.
21. method according to claim 19 is characterized in that, the described search volume of determining in the described subframe comprises:
Determine that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, wherein, M and L are respectively the integer greater than 0.
22. method according to claim 19 is characterized in that, the described search volume of determining in the described subframe comprises:
Determine that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, wherein, M and L are respectively the integer greater than 0.
23. a base station is characterized in that, comprising:
First determination module be used for to be determined the subframe search volume corresponding with user equipment (UE), described search volume same Resource Block RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Second determination module, for the demodulated reference signal DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
Sending module is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
24. base station according to claim 23 is characterized in that, described second determination module comprises:
First determining unit is used for for the resource of all RB that is used for transmission E-PDCCH, determines the DMRS port of the corresponding use of alternative E-PDCCH institute of each local formula respectively.
25. base station according to claim 23 is characterized in that, described second determination module comprises:
Second determining unit is used for for a polymerization rank, determines the DMRS port of the alternative E-PDCCH institute correspondence use of each the local formula in the described search volume respectively.
26. base station according to claim 23 is characterized in that, described second determination module comprises:
The 3rd determining unit is used for determining that configuration is used for eCCE and the corresponding relation between the DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again on the resource of all RB of E-PDCCH.
27. base station according to claim 23 is characterized in that, described second determination module comprises:
The 4th determining unit is used for eCCE and the corresponding relation of DMRS port, the employed DMRS port of alternative E-PDCCH of definite each other local formula of polymer grade again of determining that each RB is right.
28. base station according to claim 23 is characterized in that, described second determination module comprises:
The 5th determining unit is used for a polymerization rank, and a RB of described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH, each RB to corresponding one with reference to the DMRS port.
29. base station according to claim 23 is characterized in that, described second determination module comprises:
The 6th determining unit is used for a polymerization rank, and described search volume is used the different DMRS port of determining with reference to the DMRS port according to this at one group of RB respectively to each interior alternative E-PDCCH, every group of RB to corresponding one with reference to the DMRS port.
30. a subscriber equipment is characterized in that, comprising:
Receiver module be used for to receive the subframe that the base station sends, and determines the search volume corresponding with UE on the described subframe, described search volume same RB to or same group of RB to the alternative E-PDCCH of a local formula of polymer grade other one or more of interior mapping;
Determination module, for the DMRS port of the required use of alternative E-PDCCH of determining described one or more local formula, wherein, the alternative E-PDCCH of the local formula that different DMRS ports are corresponding different;
The blind Detecting module, the reference signal that is used for the DMRS port of the definite required use of basis is carried out channel estimating, according to channel estimation results, the alternative E-PDCCH of the local formula in the described search volume is carried out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
31. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
First determining unit, be used for according to the alternative E-PDCCH of each the local formula on the resource of all RB that is used for transmission E-PDCCH with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
32. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
Second determining unit, be used for according to the alternative E-PDCCH of other each local formula of polymer grade in the described search volume with the corresponding relation between the DMRS port of corresponding use, determine the employed DMRS port of the alternative E-PDCCH of other local formula of polymer grade in the described search volume.
33. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
The 3rd determining unit is used for determining the employed DMRS port of alternative E-PDCCH of each other local formula of polymer grade according to disposing for the eCCE on the resource of RB of E-PDCCH and the corresponding relation between the DMRS port.
34. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
The 4th determining unit is used for determining that according to the right eCCE of RB and the corresponding relation of DMRS port this RB is to the employed DMRS port of the alternative E-PDCCH of last each other local formula of polymer grade.
35. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
The 5th determining unit is used for a polymerization rank, determines that a RB of described search volume uses the different DMRS port of determining with reference to the DMRS port according to this respectively to each interior alternative E-PDCCH, each RB to corresponding one with reference to the DMRS port.
36. subscriber equipment according to claim 30 is characterized in that, described determination module comprises:
The 6th determining unit is used for a polymerization rank, determines that described search volume uses the different DMRS port of determining with reference to the DMRS port according to this at one group of RB respectively to each interior alternative E-PDCCH, every group of RB to corresponding one with reference to the DMRS port.
37. a base station is characterized in that, comprising:
First determination module, be used for determining the subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
Second determination module is for the DMRS port of the required use of alternative E-PDCCH of determining each local formula;
Sending module is used for selecting an alternative E-PDCCH to send control information from described search volume, and sends the reference signal of the DMRS port corresponding with the alternative E-PDCCH that selects.
38., it is characterized in that described first determination module comprises according to the described base station of claim 37:
First determining unit, the alternative E-PDCCH that be used for to determine other at least two the local formulas of polymer grade in described search volume be mapped at least two group RB to, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, RB refers to subband, the RBG that CSI reports or supports that one group of RB of combined channel estimation is right for group.
39., it is characterized in that described first determination module comprises according to the described base station of claim 37:
Second determining unit is used for determining that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, and wherein, M and L are respectively the integer greater than 0.
40., it is characterized in that described first determination module comprises according to the described base station of claim 37:
The 3rd determining unit is used for determining that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, and wherein, M and L are respectively the integer greater than 0.
41. a subscriber equipment is characterized in that, comprising:
Receiver module is used for receiving the subframe that the base station sends;
Determination module, be used for determining the described subframe search volume corresponding with UE, if comprise the alternative E-PDCCH of same other at least two local formulas of polymer grade in the described search volume, then the alternative E-PDCCH of described at least two local formulas is mapped in the RB of different frequency position to last;
The blind Detecting module, the DMRS port that is used for the alternative E-PDCCH correspondence of definite described same other at least two local formulas of polymer grade, reference signal according to the DMRS port of determining is carried out channel estimating, according to channel estimation results, alternative E-PDCCH to the local formula in the described search volume carries out blind Detecting, and on the alternative E-PDCCH that blind Detecting is determined receiving control information.
42., it is characterized in that described determination module comprises according to the described subscriber equipment of claim 41:
First determining unit, be used for determining that described search volume comprises that at least two group RB are right, the alternative E-PDCCH of other at least two local formulas of polymer grade is mapped to described at least two group RB to last, and each RB is 1 to the maximum difference of number of the alternative E-PDCCH of the local formula of organizing mapping, wherein, RB refers to subband, the RBG that CSI reports or supports that one group of RB of combined channel estimation is right for group.
43., it is characterized in that described determination module comprises according to the described subscriber equipment of claim 41:
Second determining unit is used for determining that described search volume comprises that M continuous polymerization rank is the alternative E-PDCCH of the local formula of L, and wherein, M and L are respectively the integer greater than 0.
44., it is characterized in that described determination module comprises according to the described subscriber equipment of claim 41:
The 3rd determining unit is used for determining that described search volume comprises the alternative E-PDCCH of the local formula that M discontinuous polymerization rank is L, and wherein, M and L are respectively the integer greater than 0.
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